7 hours ago, Coulomb said:

R10

I remember when R10 was enough pocket money for 2 months... I remember buying Christmas presents for the whole family with R20. I remember the R2 paper note, which became a coin... then the R5 coin followed, and right now we're quite close to a 50C Euro coin and a R10 note being of similar worth... 🙂

16 hours ago, Coulomb said:

Um, won't the museum want those exhibits back some time? 

Those items are classic. Better not break that seal... R10 fine!

Thanks for posting.

House was built in 1974 and I’m sure these are original.

 

Can Nuno please show how and where he bonded his neutral to ground. I have the problem of neutral to ground voltages of up to 110V

21 minutes ago, Thembani said:

Can Nuno please show how and where he bonded his neutral to ground. I have the problem of neutral to ground voltages of up to 110V

check my post with the drawing, I connected neutral directly to ground in the bus bar

2 minutes ago, Nuno said:

check my post with the drawing, I connected neutral directly to ground in the bus bar

I am so sorry to do this, I am new in this space. where do I find your post with the drawing? Did you connect it in the Distribution Board?

Is this the drawing

49 minutes ago, Thembani said:

Is this the drawing

yes, thats the one

On 2021/02/18 at 9:23 PM, Thembani said:

Can Nuno please show how and where he bonded his neutral to ground. I have the problem of neutral to ground voltages of up to 110V

For your info my infinisolar inverter allows the neutral to float when it is isolated from the grid and providing power to essentials via the panels or batteries.

That is, the inverter does not tie neutral to earth when operating in that isolated mode.

(When the inverter is grid tied the neutral on the essentials side is connected to the neutral on the grid side which is tied to earth back at the council connection point so there is no issue there).

What I did is that I used a contactor - the contactor coil is powered by the grid mains - so normally the contactor is held on.  I have a normally closed contact on my contactor that I put across neutral / earth on the essentials side.

So when the mains power disappears the contactor releases and the neutral / earth on the essentials side is connected.

Its not perfect since the mains voltage can (and here it does) brown out at the inverter can isolate but there is still enough volts to hold the contactor in.  But its better than nothing.

 

Hello

Old revival here, sorry for that but I'm in a similar situation.

Context:  Axpert 5kva 48v, battery pylontech us2000c, In EU (240v here, not 120v) with 3000w solar array

I have the exact same issue as your but only in SBU mode (when using battery even if grid could be used, I do it to optimize off-peak usage)

I would like to see a full schematic with all grounding wires (The one from Grid, solar panels, battery, all of them) So I make sure my own wiring is correct. Is that possible? 

Thanks 😃

23 hours ago, storm1er said:

Hello

Welcome to the forum.

23 hours ago, storm1er said:

Context:  Axpert 5kva 48v

How old is it? There should be a small sticker on the side with a date code. Automatic neutral to earth connection appeared some time in 2016, or soon thereafter, I think.

23 hours ago, storm1er said:

I would like to see a full schematic with all grounding wires (The one from Grid, solar panels, battery, all of them) So I make sure my own wiring is correct. Is that possible?

I don't have one handy, sorry. I'm sure someone does, or you could find one on this forum.

The main issue is whether your model has the automatic earthing of AC-out neutral when in battery mode only. You can check this by checking continuity from AC-out neutral to earth (any earth, they are all commoned) when the inverter isn't powered. It certainly sounds like yours does not have this feature. It's probably more convenient to check for low voltage between AC-out neutral and the earth terminal near it.

One work around that might be legal in your jurisdiction is to common AC-in neutral and AC-out neutral. That way you are always relying on the neutral to earth link in your switchboard. But you don't want to do this if your inverter has automatic bonding in battery mode.

Hello Everyone. Purchased about half year ago this unit POW-HVM PRO 6.2M-48V.
All connected respectively with line, neutral, ground in and out.
I am expiring some weird issue on both output modes SBU and SUB.
I have 3 phases after my electricity meter.

1. In SUB mode voltage on out and in seems fine 230 volts.

Let's say i have Loads 2 kWatt and PV load also 2 kWatt, from grid it's consume about 150-200 watts, which is ok. But constantly every 15-30 sec PV drops to about 1.2-1.5 kWatt and grid consume respectively 150-200 + different's 500-700 watts, and after it's works good, and cycling again. The same situation when i tried to export all load back to the grid. One of my friends have 4.2 unit without this issue.

2. In SBU mode here is my voltages between:

AC IN-OUT neutral-neutral - 120 volt
AC IN-OUT live-live - 115 volt
AC OUT neutral-ground - 117 volt
AC OUT live-ground - 117 volt
AC OUT live-neutral - 230 volt
AC IN neutral-ground - 0 volt
AC IN live-ground - 230 volt
AC IN live-neutral - 226 volt
AC OUT neutral-IN live - 344 volt
If ground disconnected from inverter the voltage between grounds 117 volt
Also, almost all light are flickering a bit in SBU mode(SUB not flickering)
If i check with phase detector in socket of my house it's shows like i have 2 Phases(but lights on both with lower light as usual), in SUB mode it's lights only one phase and much brighter.
I have 2 grounds outputs, one on box and another near AC IN (please see attachment).
Maybe it's related to wrong connections neutrals and ground?

I would very appreciated if some one can guide me in right direction to resolve those issues.

 

Edited January 12, 20242 yr by Flyzet

On 2024/01/12 at 12:06 PM, Flyzet said:

Hello Everyone. Purchased about half year ago this unit POW-HVM PRO 6.2M-48V.
All connected respectively with line, neutral, ground in and out.
I am expiring some weird issue on both output modes SBU and SUB.
I have 3 phases after my electricity meter.

1. In SUB mode voltage on out and in seems fine 230 volts.

Let's say i have Loads 2 kWatt and PV load also 2 kWatt, from grid it's consume about 150-200 watts, which is ok. But constantly every 15-30 sec PV drops to about 1.2-1.5 kWatt and grid consume respectively 150-200 + different's 500-700 watts, and after it's works good, and cycling again. The same situation when i tried to export all load back to the grid. One of my friends have 4.2 unit without this issue.

2. In SBU mode here is my voltages between:

AC IN-OUT neutral-neutral - 120 volt
AC IN-OUT live-live - 115 volt
AC OUT neutral-ground - 117 volt
AC OUT live-ground - 117 volt
AC OUT live-neutral - 230 volt
AC IN neutral-ground - 0 volt
AC IN live-ground - 230 volt
AC IN live-neutral - 226 volt
AC OUT neutral-IN live - 344 volt
If ground disconnected from inverter the voltage between grounds 117 volt
Also, almost all light are flickering a bit in SBU mode(SUB not flickering)
If i check with phase detector in socket of my house it's shows like i have 2 Phases(but lights on both with lower light as usual), in SUB mode it's lights only one phase and much brighter.
I have 2 grounds outputs, one on box and another near AC IN (please see attachment).
Maybe it's related to wrong connections neutrals and ground?

I would very appreciated if some one can guide me in right direction to resolve those issues.

 

If someone have the same issue, i checked dependency PV power and PV voltage when significant drops occurs and you can clearly check on screenshots that than power drops happen at the same time when PV voltage became less than 240 V in my case it's 237.5. So, if we check inverter label it's clearly says that "full load MPPT range is 240-450 V". So, the main issue probably that MPPT controller can't handle such loads when MPPT full load range drops below 240V. 

Later, I will try to add more 2 panels 545W and i believe that this will resolve my frequent drops PV power.

 

On 2024/01/12 at 8:06 PM, Flyzet said:

Purchased about half year ago this unit POW-HVM PRO 6.2M-48V.

I note that this is not an Axpert. Perhaps try a new thread mentioning it's a PowMr or whatever the brand actually is.

It may be more like a Voltronics Infini, since it's capable of export; i.e. it's an on-grid model, not an off-grid like an Axpert.